Abstract: A device, system and method for managing talkgroups is provided. A computing device determines that a communication device is communicating with a talkgroup via a first communication network, the talkgroup dominated by other communication devices communicating on one or more second communication networks different from the first communication network. The computing device determines a level of activity of the communication device in the talkgroup via the first communication network. When the level of activity meets a threshold condition, the computing device: requests a confirmation from the communication device to cease communication with the talkgroup; and when the confirmation is received, drops the communication device from the talkgroup.